SF2039B-3

Overview

The RFMi SF2039B-3 is a Surface Acoustic Wave (SAW) filter designed for signal conditioning applications. It operates at a center frequency of 72.54 MHz with a bandwidth of 4 MHz, covering a range from 70.69 MHz to 74.39 MHz. The component features an impedance configuration of 175 ohms and 1000 ohms and supports a maximum voltage rating of 30 V. It utilizes SMD/SMT termination types within the SMP03-S-12 package. The device functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• Optimized for intermediate frequency applications in radio systems
• Compact surface-mount packaging for automated assembly

Applications

• Satellite Digital Audio Radio Service (SDARS) RF filtering
• Intermediate frequency stages in communication receivers
• Signal conditioning in automotive audio systems

Procurement Notes

Verify the specific suffix designation against the manufacturer's current documentation to ensure compatibility with required impedance and bandwidth specifications. Confirm that the SMP03-S-12 package dimensions align with the target PCB layout constraints. Ensure environmental ratings meet the operational temperature requirements of the final assembly.

Selection Notes

Select this component when a narrow bandpass characteristic centered at 72.54 MHz is required for SDARS or similar broadcast reception. Consider the 175/1000 ohm impedance match for interface matching networks. Evaluate the 10.5 dB insertion loss impact on system noise figure and sensitivity requirements before integration into the RF front-end chain.

Part Context

This part belongs to the SF2039 series of SAW filters manufactured by RFMonolithics Inc. The series targets specific frequency bands for digital audio broadcasting. The SF2039B-3 variant specifically addresses the 72.54 MHz center frequency requirement with defined bandwidth and impedance parameters for standardized receiver designs.

Replacement Considerations

Cross-reference with SF2039B variants for potential pin-compatible alternatives. Verify if SF2039B-2 meets the specific impedance and bandwidth tolerances required for the application.